Chimney Swift

The Chimney Swift (Chaetura pelagica) is a master of the air, spending nearly its entire active life on the wing. Easily recognized by its unique silhouette, this small, sleek aerialist is a common summer resident across eastern North America. Swifts are highly specialized birds; their extremely short legs and long, sharp claws are completely unsuited for perching horizontally or walking on the ground. Instead, they are designed solely to cling to vertical surfaces. Historically nesting in large, hollow trees, the species adapted beautifully to European settlement by utilizing brick chimneys, though modern changes in home construction have caused their populations to decline structurally in recent decades.

To identify a Chimney Swift, look for the following characteristics:

• Silhouette: Often described as a "cigar with wings," they have a short, blunt body with long, narrow, curved wings that sweep back like a crescent.
• Plumage: They are clad in a uniform, dark soot-gray or brownish-black plumage, with a slightly paler throat that can be difficult to see unless the lighting is perfect.
• Flight Pattern: Their flight is incredibly rapid, erratic, and jerky, with stiff, shallow, and fast wingbeats that look like

Chimney Swifts are widely distributed across eastern North America, breeding east of the Rocky Mountains from southern Canada down to the Gulf Coast.

• Breeding Habitat: They are highly urbanized, nesting in city centers, suburban neighborhoods, and rural areas where brick chimneys, old air shafts, or large hollow trees are available.
• Wintering and Migration: During the autumn, they gather in enormous communal staging flocks before undergoing a long-distance Neotropical migration. They spend the winter in the upper Amazon basin of South America, primarily within Peru, Ecuador, Brazil, and Chile.

Chimney Swifts exhibit fascinating, specialized behaviors adapted to a life spent entirely aloft:

• Feeding: As strict aerial insectivores, they forage by flying with their mouths gaping open, scooping up thousands of insects a day. They even drink and bathe on the wing by skimming water surfaces.
• Nesting: They build small, half-saucer-shaped nests made of tiny twigs. They snap these twigs off trees using their feet while flying by, then glue them to vertical chimney walls using their own viscous, sticky saliva.
• Vocalizations: They are highly vocal in flight, emitting a continuous, rapid, high-pitched chipping or chattering call.
• Roosting: During migration, thousands of swifts gather over large industrial chimneys at dusk, forming a swirling, mesmerizing vortex before dropping collectively into the chimney to sleep.